I haven't Mike, but I can't think of any reason it would not work. I always like the look of those Eico VFO's. 73 Don N9OO On 2/19/2014 6:52 PM, Mike DeHaan wrote: > Hi Everyone, > > Has anyone used an Eico 722 or 723 VFO with a Millen transmitter or exciter? > > 73, > > Mike > W4VLJ > >